Swap vanished after reboot
Solution 1:
This is not happening in the reboot. After you finish your setup (running ecryptfs-setup-swap), go back to gparted and reload the table & open a terminal and run: sudo fdisk -l /dev/sda. You gonna find that partition still having Id 83 Linux Swap and became in Unknown format.
Why is that?! It became an encrypted partition already.
In /etc/fstab:
- Old swap partition was commented.
-
New mapped one inserted:
/dev/mapper/cryptswap1 none swap sw 0 0
This is fine.
In /etc/crypttab:
-
A new line added to map the swap:
cryptswap1 UUID=xxxx /dev/urandom swap,cipher=aes-cbc-essiv:sha256
But there is something wrong here, Does an encrypted partition have a UUID (non-encrypted)?!!!
-
So set the dev path directly as this example:
cryptswap1 /dev/sdXX /dev/urandom swap,cipher=aes-cbc-essiv:sha256 Reboot then the Swap will be on.
BTW, This should be reported as a bug. ecryptfs-setup-swap should use device path instead of uuid.
Update: I could find same answered question which include the bug report too.
- Swap not working on clean 14.04 install using encrypted home
- Bug report#953875 Encrypted swap no longer mounted at bootup
It contains the canonical answer by adding an offset= in the crypttab options.